A reasonable person who is even minimally informed about GDPR will know that an email address is covered by GDPR, hence it is "clear".
I want to emphasize - you can be right or wrong about the GDPR, but that's not the same thing as being right or wrong about whether people are confused by it.
I think it should be obvious that debating feelings or perceptions or emotions of other people tends to lead to unproductive interpersonal interactions, but perhaps others have not noticed this phenomenon. I can't imagine winning a debate with someone over whether they are trolling or not. Even if it's really obvious, nobody can see inner motivations for sure.
At the point where one can prove that one part is too (trollish || stupid) I think it is reasonable to limit how much we care about their opinions.
That is not unclear at all. They absolutely do.
That doesn't mean you can't have them, but it means you need consent, you need to be clear about how you will use them and you need to let people withdraw consent.